14 research outputs found
Role of image forces in non-contact scanning force microscope images of ionic surfaces
Get PDFAbstractWe consider the effect of the image interaction on the force acting between tip and surface in non-contact scanning force microscope experiments. This interaction is relevant when a conducting tip interacts with either a polar bulk sample or with a thick film grown on a conducting substrate. We compare the atomistic contribution due to the interaction between the microscopic tip apex and the sample with the macroscopic van der Waals and image contributions to the force on the tip for several representative NaCl clusters adsorbed on a metal substrate. We show that the microscopic force dominates above the plain (001) terrace sites and is solely responsible for image contrast. However, the image force becomes comparable to the microscopic force above the surface di-vacancy and dominates the interaction above a charged step
Elementary structural motifs in a random network of cytosine adsorbed on a gold(111) surface
No full textThe prediction of metastable impact electronic spectra (MIES): perfect and defective MgO(001) surfaces by state-of-the-art methods
No full textMeta Positioning of Carbonitrile Functional Groups Induces Interfacial Edge On Phase of Oligophenyl Derivatives
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Central limit theorems for solutions of the Kac equation: speed of approach to equilibrium in weak metrics
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